The first three lessons of the Spec Kit course are published on the
Decision Crafters YouTube channel.
Spec Kit is a method for changing code with an AI coding agent without
quietly breaking what already works. The discipline is baseline-first:
you write down what must stay true before the agent builds, and a
separate reviewer grades the result against checks that were written
before the build — so the agent that wrote the code is never the one
certifying it.
The three lessons, in the order the course is meant to be watched:
- Home — what the method is, the project the lessons build toward,
and how the course is organized.
https://www.youtube.com/watch?v=lUEZfJSMpZg - Tools & Method — the legend: what
specifyinstalls, what the
agent runs, and who checks the result.
https://www.youtube.com/watch?v=c_0A-WwQ7tU - L0 — a follow-along: adding Spec Kit to an existing repo and
shipping one small, opt-in change (a--jsonflag on a slugify
utility), with the baseline recorded before anything changed —
133 tests passing before, 141 after, and the whole feature landing
as exactly one commit.
https://www.youtube.com/watch?v=6M0uLMdHngE
The full playlist, in lesson order:
https://www.youtube.com/playlist?list=PLblFmRyuphOw
If you want to follow along, the project is
github.com/tosin2013/invoice-exception-desk — clone it, or download
the ZIP from the Code button on the repo page.
The next three lessons, L1–L3, land Friday, November 13, in the same
playlist.